Fault indicating circuit for an automotive alternator...

Details Fault indicating circuit for an automotive alternator... Fault indicating circuit for an automotive alternator...

H - Electricity

02

J

324/58.4

H02J 7/14 (2006.01) G01R 31/00 (2006.01) G01R 31/34 (2006.01) G01R 31/36 (2006.01)

Patent

CA 1159902

Abstract A fault indicating circuit for an automobile alter- nator battery charging system is disclosed. The charging system comprises an alternator providing a rectified bat- tery charging signal in response to alternator field coil excitation which is controlled by a voltage regulator that senses battery voltage. The fault indicating circuit com- prises a low voltage detector circuit which provides con- stant DC excitation for an indicator lamp in response to low alternator output voltage and a high voltage detector circuit which provides intermittent excitation for the lamp in response to an excessively high alternator output voltage, the lamp being maintained in a de-energized state in response to the normal alternator output voltage.

371731

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